I agree, I’m not a big fan of sips and I’m interested in alternative methods for insulation/sheathing/siding details. Ones that can be accomplished with conventional materials available locally as sips are expensive enough and trucking long distance drives up costs when they are manufactured a long distance from the job site. I actually built cut away wall sections for Dow Chemical when styrofoam was first introduced, long before I seen it used in the field either commercially or in residential. They spent a lot of time and money engineering ways to incorporate it into typical building practices and trying to convince builders, architects and the rest it was worth the expense. The best argument being a consistent thermal barrier from footing to the roof. I’m a carpenter not an engineer and I have a few ideas so I’m interested in seeing what other alternatives have been tried. As for the video I think it’s great I believe that method is sound although the gap at the foundation is questionable maybe a more complete mock-up would answer some questions like foundation insulation and covering/coating in conjunction with the siding above.
Great demonstration! Do you stagger the gypsum board and the SIP to avoid edges/gaps aligning? Also, just to clarify, you always leave the sill plate proud of the top of the foundation wall correct? Is this to get the vertical posts to be over the foundation wall while allowing for the room behind it for the SIPs? Is that the logic? Very good job in your content!
Could you add an additional video showing a monolithic slab and the connections needed? Just can't seem to visualize the cross section without using the joists shown in this video.
You don't put another form of sealer on the outside of the Rim Board base and under that 2X4? Sort of like a Capital "L" on the facing of the rim board and under that 2x4? Just curious.
In addition to our in-person and online courses, we are an engineering firm with a full crew. Design and engineer structures with our clients, we can cut them, deliver and erect. We can also enclose the structure with SIPs.
So please help us out with understanding completely what you are teaching. That Sill Plate looks like it is 4”X10” or wider.(?) Those Floor Joist only require a 2X4 Still Plate, and why is your Sill Plate a 4by ? That Sill Plate sits completely on top of some sort of Foundation Member, right? And the whole Sill Plate gets sealed underneath? If you have the Timber Frame Post mounted on the Sill Plate I could see the size. And when you showed underneath, shouldn't you have TWO Joists (minimum) side by side with space between both joists fully filled in SOLID with Squash Blocks/FillerBlocks/Solid Blocks which fit tightly between both Joist’s Web. Basically, that beam is required by code and Engineering principles to be FULLY/SOLIDLY Supported down through to the Sill Plate and then to solid Foundation Members to solid earth.
Hi Brian- The sill plate used here is 3 1/2" x 11 7/8"; we use a robust sill plate because it cantilevers past the foundation wall to support the SIP and will resist uplift as it holds the timber frame down to the foundation. As shown in the video, the sill plate needs to be wide enough to provide adequate bearing for the floor joists as well as extending out to the exterior of the SIP. The support underneath the posts needs to be sized to carry the weight of the loaded post above (cannot exceed the maximum compression parallel to and/or perpendicular to the grain values published in the National Design Specification); this rarely needs to be as large as the post above since the post's size is determined by the logistics of timber joinery, typically at the second floor level, and is therefore larger than it needs to be to carry gravity loads. The details of the model in the video are for illustration; every design needs to be fully developed and engineered for the specific climate, wind zone, seismic zone, timber species and design-rules of thumb are dangerous! Hope this helps to clarify.
Shelter Institute My understanding is that a sill/bottom plate should be completely supported by the foundation member it rests on. Is your Engineer licensed to certify via his stamp the integrity of this design?
As a future draftsman student, would the construction material for this type viewed on film footage be engineered for one story buildings only? For those who have experience in Australian construction homes can these buildings on film footage be in compliance with the Australian building code (ABC)? If it is not a sensible answer this time please don't share it.
Hi Anthony - While we cannot speak to the Australian building codes, this material can be sized and engineered for multi-story structures. We have used it all over the US in varying climates, adjusting to meet seismic loads, wind loads etc.
@@ShelterInstituteDo you mean material made out of timber and foam for multi story buildings for viewers out there? If it's all made out of wood then how is it structurally engineered? Certain structures require certain structural loads. So as to try to not make too many assumptions, a multi story building in a bush fire may not survive with that kind of material for the structural load; or, are there outside sprinklers on each story building? Probably it's fair to say that you're in a cold climate where in summer it's only maximum 15 to 25 degrees celsius? Architectural engineers and structural engineers often communicate with each other; agreeing on booking in a geotechnical engineer to determine the soil for your trenches, "this is interesting." I wondered you may be a structural engineer or either the other. Forgive me for providing too many assumptions, please excuse my spelling error. We are not of the same language.
@@olddodger7178 You're saying that the post should be fully aligned over the concrete wall but in the illustrations I'm seeing, that's not the case. In the example given here, if the foundation is 8" thick, only 5" of the 8" post is directly over concrete. In other examples I've seen, the post is situated well within the concrete wall entirely. In either case, I think additional lumber is used to transfer the post load to the ground. If it's a basement, you're probably going to have additional framing inside the concrete anyways to accommodate the insulation. As for the SIP, Gaius says the concrete extends 2" beyond the rim board but we can also calculate that the combination of gypsum (1/2") and SIP (4 1/2") equals 5" so the SIP and the sill plate hang 3" beyond the concrete. That seems a bit weird, but the stuff is pretty light and I guess it's mostly supported by screws? OSB has poor compression strength so it was never designed to transfer it's load to it's bottom edge. Don't put too much stock into what I'm saying here. This is just speculation on my part. I'll post again if I get a definitive answer.
